Ungrounded Power Cord Wiring Diagram. All 120 volt circuits have both the white wire neutral and ground connected on the same neutralground bus bar in the home panel. A horsepower rated attachment plug and receptacle rated at least the rating of the motor can be used.
See a photo of what bad connections occasionally can look like. Includes information on power line safety. A general use switch can be used for a torque.
This article describes how to install a 30 amp shore power system on a small boat.
All 120 volt circuits have both the white wire neutral and ground connected on the same neutralground bus bar in the home panel. There may be variations between this information and the specific spa you choose to purchase. The unit should stop operating and the gfci power indicator will go out. 208 volts from the black to the blue 208 volts from the black to the red.